JP2015523723A - High voltage junction field effect transistor - Google Patents

High voltage junction field effect transistor Download PDF

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JP2015523723A
JP2015523723A JP2015516426A JP2015516426A JP2015523723A JP 2015523723 A JP2015523723 A JP 2015523723A JP 2015516426 A JP2015516426 A JP 2015516426A JP 2015516426 A JP2015516426 A JP 2015516426A JP 2015523723 A JP2015523723 A JP 2015523723A
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グアンタオ ハン
グアンタオ ハン
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シーエスエムシー テクノロジーズ エフエイビー1 カンパニー リミテッド
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Abstract

本発明は、高電圧JFETを開示する。高電圧JFETは、第1導電型エピタキシャル層上に配置された第2導電型ドリフト領域と;第2導電型ドリフト領域内に配置された第2導電型ドレイン高ドープ領域と;第2導電型ドリフト領域上及び第2導電型ドレイン高ドープ領域の1つの側に配置されたドレイン端子酸素領域と;第2導電型ドリフト領域の1つの側に配置された第1導電型ウェル領域と;第1導電型ウェル領域上に配置された第2導電型ソース高ドープ領域及び第1導電型ゲート高ドープ領域、並びにゲートソース端子酸素領域と;第2導電型ソース高ドープ領域と第2導電型ドリフト領域との間に配置された第2導電型チャネル層と;第2導電型チャネル層上に配置された誘電体層及びフィールド電極プレートとを含む。ドレイン電極が、第2導電型ドレイン高ドープ領域から電気的に導出され、ソース電極が、フィールド電極プレートと第2導電型ソース高ドープ領域との接続から電気的に導出され、ゲート電極が、第1導電型ゲート高ドープ領域から電気的に導出される。このトランジスタは高降伏電圧を有し、集積容易である。【選択図】図1The present invention discloses a high voltage JFET. The high voltage JFET includes a second conductivity type drift region disposed on the first conductivity type epitaxial layer; a second conductivity type drain highly doped region disposed in the second conductivity type drift region; and a second conductivity type drift A drain terminal oxygen region disposed on the region and on one side of the second conductivity type drain heavily doped region; a first conductivity type well region disposed on one side of the second conductivity type drift region; A second conductivity type source highly doped region and a first conductivity type gate highly doped region, and a gate source terminal oxygen region disposed on the well region; a second conductivity type source highly doped region and a second conductivity type drift region; A second conductivity type channel layer disposed between the second conductivity type channel layer; and a dielectric layer and a field electrode plate disposed on the second conductivity type channel layer. The drain electrode is electrically derived from the second conductivity type drain heavily doped region, the source electrode is electrically derived from the connection between the field electrode plate and the second conductivity type source highly doped region, and the gate electrode is electrically coupled to the first electrode. It is electrically derived from the one-conductivity type gate highly doped region. This transistor has a high breakdown voltage and is easy to integrate. [Selection] Figure 1

Description

本発明は、電界効果トランジスタのデバイス構造に関し、より具体的には、半導体製造の分野に属する、高電圧で適用されるJFET(Junction Field Effect Transistor;接合型電界効果トランジスタ)に関する。   The present invention relates to a device structure of a field effect transistor, and more particularly to a JFET (Junction Field Effect Transistor) applied at a high voltage, which belongs to the field of semiconductor manufacturing.

電界効果トランジスタは、例えば、増幅器回路、バイアス回路若しくは降圧回路、始動回路又は可変抵抗等に適用される種々のシミュレーション回路を設計するために広く用いられる。高電圧デバイスに対して新たに現れつつある要求として、電界効果トランジスタの様々な種類の降伏電圧(breakdown voltage)を改善する方法が、高電圧電界効果トランジスタの設計目標になってきている。   Field effect transistors are widely used to design various simulation circuits applied to, for example, amplifier circuits, bias circuits or step-down circuits, starting circuits, variable resistors, and the like. As an emerging requirement for high voltage devices, methods for improving various types of breakdown voltages of field effect transistors have become design goals for high voltage field effect transistors.

MOSFET(Metal−Oxide−Semiconductor Field Effect Transistor;金属酸化膜半導体電界効果トランジスタ)において、プレーナ拡散(planar diffusion)技術を用いたDMOS(Double−diffused MOS;二重拡散MOS)は、高電流駆動能力、低いオン抵抗、及び高い降伏電圧等の特徴を備えるので、DMOSは、パワーデバイスにより広く用いられている。ここでは、LDMOSFET(Lateral Double−diffused MOSFET;横型二重拡散MOS)は、CMOS技術により適合するため、DMOSが広く用いられている。通常、DMOSデバイスには、活性領域とドレイン領域との間にドリフト領域が設けられ、ドリフト領域の不純物濃度は比較的低い。LDMOSが高電圧に接続されると、ドリフト領域は高インピーダンスを有するので、ドリフト領域は比較的高電圧に耐えることができる。さらに、LDMOSの多結晶層又は金属層が、ドリフト領域の酸素領域の上に延び、フィールド電極プレートとして働き、これにより、ドリフト領域の表面電場が弱まり、降伏電圧を改善するという利点がもたらされる。   In a MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor), a DMOS (Double-diffused MOS) using a planar diffusion technique has a high current driving capability. DMOS is widely used by power devices because it has features such as low on-resistance and high breakdown voltage. Here, an LDMOSFET (Lateral Double-diffused MOSFET; lateral double-diffused MOS) is more suitable for CMOS technology, and thus a DMOS is widely used. Usually, a DMOS device is provided with a drift region between an active region and a drain region, and the impurity concentration of the drift region is relatively low. When the LDMOS is connected to a high voltage, the drift region can withstand a relatively high voltage because the drift region has a high impedance. In addition, the polycrystalline or metal layer of the LDMOS extends over the oxygen region of the drift region and acts as a field electrode plate, which provides the advantage that the surface electric field of the drift region is weakened and the breakdown voltage is improved.

JFETにおいては、LDMOSFETとは異なり、JFETのドレイン電極電圧が、ドレイン電極及びゲート電極のPN接合に印加され、破壊点は、通常、表面上ではなく本体内に配置される。従って、フィールド電極によっても又は他のタイプによっても、JFETの降伏電圧を改善することができない。つまり、従来のJFETはPN接合により制限され、降伏電圧は約20〜30ボルトであり、そのため高電圧場におけるJFETの適用が制限される。   In the JFET, unlike the LDMOSFET, the drain electrode voltage of the JFET is applied to the PN junction of the drain electrode and the gate electrode, and the breakdown point is usually placed in the body rather than on the surface. Therefore, the breakdown voltage of the JFET cannot be improved by the field electrode or other types. That is, the conventional JFET is limited by the PN junction, and the breakdown voltage is about 20 to 30 volts, which limits the application of the JFET in a high voltage field.

しかしながら、新たに現れつつある高電圧半導体集積回路技術においては、電力管理チップのようなチップの要件を満たすために、高電圧MOSトランジスタだけではなく、高降伏電圧を有しかつCMOS/LDMOS集積回路製造技術に適合する高電圧JFETも必要とされる。   However, in the emerging high voltage semiconductor integrated circuit technology, not only high voltage MOS transistors but also high breakdown voltages and CMOS / LDMOS integrated circuits are used to meet the requirements of chips such as power management chips. There is also a need for high voltage JFETs that are compatible with manufacturing technology.

本発明により解決されるべき技術的問題は、高降伏電圧を有しかつCMOS/LDMOS集積回路に適合する高電圧JFETを提供することである。   The technical problem to be solved by the present invention is to provide a high voltage JFET that has a high breakdown voltage and is compatible with CMOS / LDMOS integrated circuits.

上記の技術的問題を解決するために、本発明により次のような解決法が採用される。:
高電圧接合型電界効果トランジスタが、
第1導電型エピタキシャル層を備えた半導体基板と、
第1導電型エピタキシャル層上に配置された第2導電型ドリフト領域と、
第2導電型ドリフト領域内に配置された第2導電型ドレイン高ドープ(heavily doped)領域と、
第2導電型ドリフト領域上及び第2導電型ドレイン高ドープ領域の1つの側に配置されたドレイン端子酸素領域と、
第2導電型ドリフト領域の1つの側に配置され、第1導電型エピタキシャル層により第2導電型ドリフト領域から分離される、第1導電型ウェル領域と、
第1導電型ウェル領域上に配置された第2導電型ソース高ドープ領域及び第1導電型ゲート高ドープ領域、並びに第2導電型ソース高ドープ領域と第1導電型ゲート高ドープ領域との間に設けられ、第1導電型ゲート高ドープ領域から第2導電型ソース高ドープ領域を分離するゲートソース端子酸素領域と、
第2導電型ソース高ドープ領域と第2導電型ドリフト領域との間に配置された第2導電型チャネル層と、
第2導電型チャネル層上に配置され、ドレイン端子酸素領域の表面の一部分まで延びるフィールド電極プレート、並びにフィールド電極プレートと第2導電型チャネル層との間及び同じくフィールド電極プレートと第2導電型ドリフト領域との間に設けられた誘電体層と、
を含み、
ドレイン電極が、第2導電型ドレイン高ドープ領域から電気的に導出され、ソース電極が、フィールド電極プレートと第2導電型ソース高ドープ領域との接続から電気的に導出され、ゲート電極が、第1導電型ゲート高ドープ領域から電気的に導出される。
In order to solve the above technical problem, the following solution is adopted by the present invention. :
High voltage junction field effect transistor
A semiconductor substrate comprising a first conductivity type epitaxial layer;
A second conductivity type drift region disposed on the first conductivity type epitaxial layer;
A second conductivity type drain heavily doped region disposed in the second conductivity type drift region;
A drain terminal oxygen region disposed on the second conductivity type drift region and on one side of the second conductivity type drain heavily doped region;
A first conductivity type well region disposed on one side of the second conductivity type drift region and separated from the second conductivity type drift region by the first conductivity type epitaxial layer;
The second conductivity type source highly doped region and the first conductivity type gate highly doped region disposed on the first conductivity type well region, and between the second conductivity type source highly doped region and the first conductivity type gate highly doped region. A gate source terminal oxygen region for separating the second conductivity type source highly doped region from the first conductivity type gate highly doped region,
A second conductivity type channel layer disposed between the second conductivity type source heavily doped region and the second conductivity type drift region;
A field electrode plate disposed on the second conductivity type channel layer and extending to a part of the surface of the drain terminal oxygen region, and between the field electrode plate and the second conductivity type channel layer and also the field electrode plate and the second conductivity type drift A dielectric layer provided between the regions;
Including
The drain electrode is electrically derived from the second conductivity type drain heavily doped region, the source electrode is electrically derived from the connection between the field electrode plate and the second conductivity type source highly doped region, and the gate electrode is electrically coupled to the first electrode. It is electrically derived from the one-conductivity type gate highly doped region.

好ましい実施形態において、第2導電型チャネル層は、イオン注入により形成された第2導電型注入層である。   In a preferred embodiment, the second conductivity type channel layer is a second conductivity type implantation layer formed by ion implantation.

好ましい実施形態において、フィールド電極プレートは多結晶層又は金属層である。   In a preferred embodiment, the field electrode plate is a polycrystalline layer or a metal layer.

好ましい実施形態において、高電圧電界効果トランジスタは、その両側に第2導電型ウェル領域を備えており、第2導電型ディープウェル領域が、第1導電型エピタキシャル層の下に設けられて、高電圧電界効果トランジスタを分離する。   In a preferred embodiment, the high voltage field effect transistor includes a second conductivity type well region on both sides thereof, and the second conductivity type deep well region is provided below the first conductivity type epitaxial layer, Isolate the field effect transistor.

好ましい実施形態において、耐高電圧構造体が、第1導電型ウェル領域の反対側の第2導電型ドリフト領域の1つの側に設けられる。   In a preferred embodiment, a high voltage resistant structure is provided on one side of the second conductivity type drift region opposite the first conductivity type well region.

好ましい実施形態において、第1導電型はP型であり、前記第2導電型はN型である。   In a preferred embodiment, the first conductivity type is P-type and the second conductivity type is N-type.

好ましい実施形態において、第1導電型はN型であり、前記第2導電型はP型である。   In a preferred embodiment, the first conductivity type is N type, and the second conductivity type is P type.

別の実施形態による高電圧接合型電界効果トランジスタが、
第1導電型エピタキシャル層を備えた半導体基板と、
第1導電型エピタキシャル層上に配置された第2導電型ドリフト領域と、
第2導電型ドリフト領域内に配置された第2導電型ドレイン高ドープ領域と、
第2導電型ドレイン高ドープ領域の両側に配置され、両方とも第2導電型ドリフト領域上に配置された、2つのドレイン端子酸素領域と、
第2導電型ドリフト領域の両側に配置され、各々が第1導電型エピタキシャル層により第2導電型ドリフト領域から分離される、2つの第1導電型ウェル領域と、
第1導電型ウェル領域の各々の中の第2導電型ソース高ドープ領域及び第1導電型ゲート高ドープ領域、並びに第2導電型ソース高ドープ領域と第1導電型ゲート高ドープ領域との間に設けられて、第1導電型ゲート高ドープ領域から第2導電型ソース高ドープ領域を分離するゲートソース端子酸素領域と、
各々が1つの第2導電型ソース高ドープ領域と第2導電型ドリフト領域との間に配置された、2つの第2導電型チャネル層と、
それぞれ2つの第2導電型チャネル層上に配置され、各々が対応するドレイン端子酸素領域の表面の一部分まで延びる2つのフィールド電極プレート、並びにフィールド電極プレートと第2導電型チャネル層との間及び同じくフィールド電極プレートと第2導電型ドリフト領域との間に設けられた誘電体層と、
を含み、
ドレイン電極が、2つの第2導電型ドレイン高ドープ領域から電気的に導出され、ソース電極が、ドレイン電極の反対側の2つのフィールド電極プレートと2つの第2導電型ソース高ドープ領域との接続から電気的に導出され、ゲート電極が、ドレイン電極の両側の2つの第1導電型ゲート高ドープ領域の接続から電気的に導出される。
A high voltage junction field effect transistor according to another embodiment comprises:
A semiconductor substrate comprising a first conductivity type epitaxial layer;
A second conductivity type drift region disposed on the first conductivity type epitaxial layer;
A second conductivity type drain heavily doped region disposed in the second conductivity type drift region;
Two drain terminal oxygen regions disposed on opposite sides of the second conductivity type drain heavily doped region, both disposed on the second conductivity type drift region;
Two first conductivity type well regions disposed on both sides of the second conductivity type drift region, each separated from the second conductivity type drift region by a first conductivity type epitaxial layer;
A second conductivity type source highly doped region and a first conductivity type gate highly doped region in each of the first conductivity type well regions, and between the second conductivity type source highly doped region and the first conductivity type gate highly doped region. A gate source terminal oxygen region separating the second conductivity type source highly doped region from the first conductivity type gate highly doped region;
Two second conductivity type channel layers, each disposed between one second conductivity type source heavily doped region and a second conductivity type drift region;
Two field electrode plates, each disposed on two second conductivity type channel layers, each extending to a portion of the surface of the corresponding drain terminal oxygen region, and between the field electrode plate and the second conductivity type channel layer and A dielectric layer provided between the field electrode plate and the second conductivity type drift region;
Including
The drain electrode is electrically derived from the two second conductivity type drain heavily doped regions, and the source electrode is connected to the two field electrode plates opposite to the drain electrode and the two second conductivity type source highly doped regions. The gate electrode is electrically derived from the connection of the two first conductivity type gate highly doped regions on both sides of the drain electrode.

好ましい実施形態において、第2導電型チャネル層は、イオン注入により形成された第2導電型注入層である。   In a preferred embodiment, the second conductivity type channel layer is a second conductivity type implantation layer formed by ion implantation.

好ましい実施形態において、フィールド電極プレートは多結晶層又は金属層である。   In a preferred embodiment, the field electrode plate is a polycrystalline layer or a metal layer.

好ましい実施形態において、高電圧電界効果トランジスタは、その両側に第2導電型ウェル領域を備えており、第2導電型ディープウェル領域が、第1導電型エピタキシャル層の下に設けられて、高電圧電界効果トランジスタを分離する。   In a preferred embodiment, the high voltage field effect transistor includes a second conductivity type well region on both sides thereof, and the second conductivity type deep well region is provided below the first conductivity type epitaxial layer, Isolate the field effect transistor.

好ましい実施形態において、第1導電型はP型であり、前記第2導電型はN型である。   In a preferred embodiment, the first conductivity type is P-type and the second conductivity type is N-type.

好ましい実施形態において、第1導電型はN型であり、前記第2導電型はP型である。   In a preferred embodiment, the first conductivity type is N type, and the second conductivity type is P type.

本発明の高電圧JFETは、LDMOSの耐高電圧構造体を参考とし、エピタキシャル層の表面上にチャネルを配置し、チャネルとドレイン端子酸素領域上に設けられたフィールド電極プレートでRESUEF原理を用いて、JFETの降伏電圧を大幅に高める。チャネル注入層の注入条件を制御することにより、高電圧JFETのピンチ・オフ電圧を調整することができる。高電圧半導体集積回路製造技術の要件を満たすために、高電圧JFETの製造技術は、従来のCMOS/LDMOS集積回路製造技術に適合する。   The high-voltage JFET of the present invention refers to the high-voltage structure of the LDMOS, uses a RESUEF principle with a field electrode plate provided on the surface of the epitaxial layer and a channel electrode on the surface of the epitaxial layer. Greatly increases the breakdown voltage of the JFET. By controlling the injection conditions of the channel injection layer, the pinch-off voltage of the high voltage JFET can be adjusted. To meet the requirements of high voltage semiconductor integrated circuit manufacturing technology, the high voltage JFET manufacturing technology is compatible with conventional CMOS / LDMOS integrated circuit manufacturing technology.

添付図面を参照して、本発明の技術的解決法が、以下に明確かつ完全に説明される。説明される実施形態は、本発明の実施形態の全てではなく、単に一部分にすぎないことは明らかである。本発明の実施形態に基づいて当業者により得られる全ての他の実施形態は、創造的努力なしに、本発明の保護範囲内に入るであろう。   The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention will fall within the protection scope of the present invention without creative efforts.

本発明の1つの実施形態による高電圧JFETデバイスの概略図である。1 is a schematic diagram of a high voltage JFET device according to one embodiment of the invention. FIG. 本発明の別の実施形態による高電圧JFETデバイスの概略図である。FIG. 6 is a schematic diagram of a high voltage JFET device according to another embodiment of the invention. 本発明の別の実施形態による高電圧JFETデバイスのId−Vgsの特性グラフである。6 is a characteristic graph of Id-Vgs of a high voltage JFET device according to another embodiment of the present invention. 本発明の別の実施形態による高電圧JFETデバイスのId−Vdsの特性グラフである。6 is a graph of Id-Vds characteristics of a high voltage JFET device according to another embodiment of the present invention.

以下に、本発明の実施形態における添付図面を参照して、本発明の実施形態の技術的解決法を明確に説明する。明らかに、説明される実施形態は、本発明の実施形態の全てではなく、単に一部分にすぎない。本発明の実施形態に従って当業者により得られる全ての他の実施形態は、創造的努力なしに、本発明の保護範囲内に入るであろう。   The technical solutions of the embodiments of the present invention will be clearly described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art according to the embodiments of the present invention will fall within the protection scope of the present invention without creative efforts.

背景で説明されるように、PN接合による制限として、従来のJFETの降伏電圧は、約20〜30ボルトである。高電圧半導体集積回路技術の要件を満たすために、本発明は、より高い入力電圧に適合され、CMOS/LDMOS集積回路製造技術に適合する、高電圧JFETを提供する。デバイスの構造は、図面を参照して以下に具体的に説明される。   As explained in the background, as a limitation due to the PN junction, the breakdown voltage of a conventional JFET is about 20-30 volts. To meet the requirements of high voltage semiconductor integrated circuit technology, the present invention provides a high voltage JFET that is adapted to higher input voltages and compatible with CMOS / LDMOS integrated circuit manufacturing technology. The structure of the device will be specifically described below with reference to the drawings.

実施形態1
図1を参照すると、高電圧JFETが、第1導電型エピタキシャル層100を備えた半導体基板と;第1導電型エピタキシャル層100上に配置された第2導電型ドリフト領域110と;第2導電型ドリフト領域110内に配置された第2導電型ドレイン高ドープ領域120と;第2導電型ドリフト領域110上及び第2導電型ドレイン高ドープ領域120の1つの側に配置されたドレイン端子酸素領域130と;第2導電型ドリフト領域110の1つの側に配置され、第1導電型エピタキシャル層100により第2導電型ドリフト領域110から分離される第1導電型ウェル領域140と;第1導電型ウェル領域140上に配置された第2導電型ソース高ドープ領域150及び第1導電型ゲート高ドープ領域160、並びに第2導電型ソース高ドープ領域150と第1導電型ゲート高ドープ領域160との間に設けられ、上記2つの領域150、160を分離するゲートソース端子酸素領域170と;第2導電型ソース高ドープ領域150と第2導電型ドリフト領域110との間に配置された第2導電型チャネル層180と;第2導電型チャネル層180上に配置され、ドレイン端子酸素領域130の表面の一部分に延びるフィールド電極プレート190、並びにフィールド電極プレート190と第2導電型チャネル層180との間及びフィールド電極プレート190と第2導電型ドリフト領域110との間に設けられた誘電体層191と;第2導電型ドレイン高ドープ領域120から電気的に導出されたドレイン電極Dと;フィールド電極プレート190と第2導電型ソース高ドープ領域150との接続から電気的に導出されたソース電極Sと;第1導電型ゲート高ドープ領域160から電気的に導出されたゲート電極Gとを含む。
Embodiment 1
Referring to FIG. 1, a high voltage JFET includes a semiconductor substrate having a first conductivity type epitaxial layer 100; a second conductivity type drift region 110 disposed on the first conductivity type epitaxial layer 100; and a second conductivity type. A second conductivity type drain heavily doped region 120 disposed in the drift region 110; a drain terminal oxygen region 130 disposed on the second conductivity type drift region 110 and on one side of the second conductivity type drain highly doped region 120; A first conductivity type well region 140 disposed on one side of the second conductivity type drift region 110 and separated from the second conductivity type drift region 110 by the first conductivity type epitaxial layer 100; Second conductivity type source heavily doped region 150 and first conductivity type gate highly doped region 160 disposed on region 140, and second conductivity type saw A gate source terminal oxygen region 170 provided between the highly doped region 150 and the first conductivity type gate highly doped region 160 and separating the two regions 150 and 160; the second conductivity type source highly doped region 150 and the first conductivity type gate highly doped region 160; A second conductivity type channel layer 180 disposed between the two conductivity type drift region 110; a field electrode plate 190 disposed on the second conductivity type channel layer 180 and extending to a part of the surface of the drain terminal oxygen region 130; And a dielectric layer 191 provided between the field electrode plate 190 and the second conductivity type channel layer 180 and between the field electrode plate 190 and the second conductivity type drift region 110; and a second conductivity type drain highly doped region Drain electrode D electrically derived from 120; field electrode plate 190 and second conductivity type source height Including a first conductivity type gate high doped region 160 and an electrically derived gate electrode G; and the source electrode S which is electrically led from the connection between the-loop region 150.

第1導電型がP型として選択された場合、第2導電型はN型として選択され、デバイスはNチャネルJFETとなる。第1導電型がN型として選択され、第2導電型がP型として選択された場合、デバイスはPチャネルJFETとなる。ドレイン電極D、ソース電極S、ゲート電極Gは、金属配線から導出することができ、これは当業者には周知であり、本明細書には詳細に説明しない。   If the first conductivity type is selected as P-type, the second conductivity type is selected as N-type and the device is an N-channel JFET. If the first conductivity type is selected as N-type and the second conductivity type is selected as P-type, the device is a P-channel JFET. The drain electrode D, source electrode S, and gate electrode G can be derived from metal wiring, which is well known to those skilled in the art and will not be described in detail herein.

ゲート電極Gは、第1導電型ゲート高ドープ領域160を介して第1導電型ウェル領域140に接続され、第1導電型ウェル領域140と第2導電型チャネル層180との間の欠乏領域が、ゲート電極電圧に影響を受けることがあり、それによりJFETの電流及びオンオフが制御される。好ましくは、第2導電型チャネル層180は、イオン注入により形成された第2導電型注入層であり、注入条件を制御することにより、電界効果トランジスタのピンチ・オフ電圧を調整することができる。   The gate electrode G is connected to the first conductivity type well region 140 via the first conductivity type gate highly doped region 160, and a depletion region between the first conductivity type well region 140 and the second conductivity type channel layer 180 is formed. May be affected by the gate electrode voltage, thereby controlling the current and on / off of the JFET. Preferably, the second conductivity type channel layer 180 is a second conductivity type implantation layer formed by ion implantation, and the pinch-off voltage of the field effect transistor can be adjusted by controlling the implantation conditions.

JFETのドレイン端子は、LDMOSの耐高電圧構造体を参考とし、第2導電型ドリフト領域110、ドレイン端子酸素領域130を備え、フィールド電極プレート190はドレイン端子酸素領域130の表面の一部分まで延び、チャネルはエピタキシャル層の表面上に配置され、RESURE原理を用いてJFETの降伏電圧を大幅に高める。フィールド電極プレート190は、多結晶層又は金属層とすることができる。実施形態において、フィールド電極プレート190は多結晶層であることが好ましい。フィールド電極プレート190は、ソース電極Sに接続され、同じ電位を保持する。こうした金属配線のために、第1導電型ウェル領域140と第2導電型チャネル層180との間の欠乏領域によってのみ、ピンチ・オフ電圧を制御することができる。フィールド電極プレート190の電位が浮遊接続された場合、誘導電位により、ピンチ・オフ電圧の変動が生じることがある。フィールド電極プレート190が、ゲート電極G、すなわち第1導電型ウェル領域140に接続された場合、これにより生じた逆バイアスは、図1の部分A上の第2導電型ドリフト領域110の電荷を容易に排出し、ピンチ・オフ電圧が第2導電型チャネル層180の技術条件によって制御できなくなり、トランジスタが早期にカットオフ領域に入ることがある。   The drain terminal of the JFET refers to the high-voltage structure of the LDMOS, and includes the second conductivity type drift region 110 and the drain terminal oxygen region 130. The field electrode plate 190 extends to a part of the surface of the drain terminal oxygen region 130, The channel is located on the surface of the epitaxial layer and uses the RESURE principle to greatly increase the breakdown voltage of the JFET. The field electrode plate 190 can be a polycrystalline layer or a metal layer. In the embodiment, the field electrode plate 190 is preferably a polycrystalline layer. The field electrode plate 190 is connected to the source electrode S and holds the same potential. Due to such metal wiring, the pinch-off voltage can be controlled only by the depletion region between the first conductivity type well region 140 and the second conductivity type channel layer 180. When the potential of the field electrode plate 190 is connected in a floating manner, the pinch-off voltage may vary due to the induced potential. When the field electrode plate 190 is connected to the gate electrode G, that is, the first conductivity type well region 140, the reverse bias generated thereby easily charges the second conductivity type drift region 110 on the portion A in FIG. The pinch-off voltage cannot be controlled by the technical conditions of the second conductivity type channel layer 180, and the transistor may enter the cut-off region early.

さらに、デバイスを基板から分離し、異なる設計の要件を満たすために、高電圧電界効果トランジスタは、その両側の第2導電型ウェル領域101と、第1導電型エピタキシャル層100の下の第2導電型ディープウェル領域102とを備えており、これにより、高電圧電界効果トランジスタを分離するための分離構造体が形成される。   Further, in order to separate the device from the substrate and meet different design requirements, the high voltage field effect transistor includes a second conductivity type well region 101 on both sides of the high voltage field effect transistor and a second conductivity type below the first conductivity type epitaxial layer 100. Type deep well region 102, thereby forming an isolation structure for isolating the high voltage field effect transistor.

本実施形態の好ましいソリューションとして、高圧を、高圧JFETのドレイン電極Dに印加し、低濃度及び大きいサイズを有するウェル領域のような耐高圧構造体、すなわち従来のウェル分離構造体を、第1導電型ウェル領域140の反対側の第2導電型ドリフト領域110の側に設け、これにより、高電圧の印加時にJFETがもたらす周囲デバイスへの影響を回避することができる。   As a preferable solution of the present embodiment, a high voltage is applied to the drain electrode D of the high voltage JFET, and a high voltage resistant structure such as a well region having a low concentration and a large size, that is, a conventional well isolation structure is used as the first conductive By providing the second conductivity type drift region 110 on the opposite side of the type well region 140, it is possible to avoid the influence on the surrounding devices caused by the JFET when a high voltage is applied.

実施形態2
図2を参照すると、別の1つの高圧JFETが、第1導電型エピタキシャル層200を備えた半導体基板と;第1導電型エピタキシャル層200上に配置された第2導電型ドリフト領域210と;第2導電型ドリフト領域210内に配置された第2導電型ドレイン高ドープ領域220と;第2導電型ドレイン高ドープ領域220の両側に配置され、両方とも第2導電型ドリフト領域210上に配置された、第1のドレイン端子酸素領域230及び第2のドレイン端子酸素領域2300と;第2導電型ドリフト領域210の両側に配置され、両方とも第1導電型エピタキシャル層200により第2導電型ドリフト領域210から分離される、第1の第1導電型ウェル領域240及び第2の第1導電型ウェル領域2400と;第1の第1導電型ウェル領域240内に配置された第1の第2導電型ソース高ドープ領域260及び第1の第1導電型ゲート高ドープ領域250、並びに第1の第2導電型ソース高ドープ領域260と第1の第1導電型ゲート高ドープ領域250との間に配置され、上記2つの高ドープ領域260、250を分離する第1のゲートソース端子酸素領域270と;第2の第1導電型ウェル領域2400内に配置された第2の第2導電型ソース高ドープ領域2600及び第2の第1導電型ゲート高ドープ領域2500、並びに第2の第2導電型ソース高ドープ領域2600と第2の第1導電型ゲート高ドープ領域2500との間に配置され、上記2つの高ドープ領域2600、2500を分離する第2のゲートソース端子酸素領域2700と;第1の第2導電型ソース高ドープ領域250と第2導電型ドリフト領域210との間に配置された第1の第2導電型チャネル層280と;第2の第2導電型ソース高ドープ領域2500と第2導電型ドリフト領域210との間に配置された第2の第2導電型チャネル層2800と;それぞれ、第1の第2導電型チャネル層280及び第2の第2導電型チャネル層2800上に配置され、かつ、第1のドレイン端子酸素領域230及び第2のドレイン端子酸素領域2300の表面の一部分まで延びる第1のフィールド電極プレート290及び第2の多結晶領域フィールド電極プレート2900と、第1のフィールド電極プレート290と第1の第2導電型チャネル層280との間及び同じく第1のフィールド電極プレート290と第2導電型ドリフト領域210との間に設けられた第1の誘電体層291と、第2のフィールド電極プレート2900と第2の第2導電型チャネル層2800との間及び同じく第2のフィールド電極プレート2900と第2導電型ドリフト領域210との間に設けられた第2の誘電体層2910と;第2導電型ドレイン高ドープ領域220から電気的に導出されるドレイン電極Dと;ドレイン電極Dの両側の、第1のフィールド電極プレート290と第2のフィールド電極プレート2900、並びに第1の第2導電型ソース高ドープ領域250と第2の第2導電型ソース高ドープ領域2500との接続から電気的に導出されるソース電極Sと;ドレイン電極Dの両側の、第1の第2導電型ソース高ドープ領域260と第2の第2導電型ソース高ドープ領域2600との接続から電気的に導出されるゲート電極Gとを含む。
Embodiment 2
Referring to FIG. 2, another high voltage JFET includes a semiconductor substrate with a first conductivity type epitaxial layer 200; a second conductivity type drift region 210 disposed on the first conductivity type epitaxial layer 200; A second conductivity type drain heavily doped region 220 disposed in the second conductivity type drift region 210; disposed on both sides of the second conductivity type drain highly doped region 220, and both are disposed on the second conductivity type drift region 210. In addition, the first drain terminal oxygen region 230 and the second drain terminal oxygen region 2300 are disposed on both sides of the second conductivity type drift region 210, and both are provided by the first conductivity type epitaxial layer 200 in the second conductivity type drift region. A first first conductivity type well region 240 and a second first conductivity type well region 2400, separated from 210; The first second conductivity type source heavily doped region 260 and the first first conductivity type gate highly doped region 250, and the first second conductivity type source highly doped region 260 and the first A first gate source terminal oxygen region 270 that is disposed between the first conductivity type gate highly doped region 250 and separates the two highly doped regions 260, 250; and a second first conductivity type well region 2400 A second second conductivity type source heavily doped region 2600 and a second first conductivity type gate highly doped region 2500, and a second second conductivity type source highly doped region 2600 and a second first A second gate source terminal oxygen region 2700 disposed between the conductive type highly doped region 2500 and separating the two highly doped regions 2600, 2500; a first second conductive type saw A first second conductivity type channel layer 280 disposed between the highly doped region 250 and the second conductivity type drift region 210; a second second conductivity type source highly doped region 2500 and a second conductivity type drift region; A second second conductivity type channel layer 2800 disposed between the first second conductivity type channel layer 280 and the second second conductivity type channel layer 2800, respectively; and A first field electrode plate 290 and a second polycrystalline region field electrode plate 2900 extending to part of the surface of the first drain terminal oxygen region 230 and the second drain terminal oxygen region 2300, and the first field electrode plate 290 Between the first field electrode plate 290 and the second conductivity type drift region 210. The first dielectric layer 291 provided between the second field electrode plate 2900 and the second second conductivity type channel layer 2800 and also the second field electrode plate 2900 and the second conductivity type drift region. 210, a second dielectric layer 2910 provided between the drain electrode D and the drain electrode D electrically derived from the second conductivity type drain heavily doped region 220; first field electrodes on both sides of the drain electrode D; The source electrode S electrically derived from the connection between the plate 290 and the second field electrode plate 2900 and the first second conductivity type source heavily doped region 250 and the second second conductivity type source highly doped region 2500. And from the connection between the first second conductivity type source highly doped region 260 and the second second conductivity type source highly doped region 2600 on both sides of the drain electrode D. And a gate electrode G is to derive.

第1導電型がP型として選択された場合、第2導電型はN型として選択され、従って、デバイスはNチャネルJFETとなり、第1導電型がN型として選択された場合、第2導電型はP型として選択され、従って、デバイスはPチャネルJFETとなる。ドレイン電極D、ソース電極S、ゲート電極Gは、金属配線から導出することができ、これは当業者には周知であり、本明細書には具体的詳細を説明しない。   If the first conductivity type is selected as P-type, the second conductivity type is selected as N-type, so the device is an N-channel JFET, and if the first conductivity type is selected as N-type, the second conductivity type Is selected as P-type, so the device is a P-channel JFET. The drain electrode D, the source electrode S, and the gate electrode G can be derived from metal wiring, which is well known to those skilled in the art, and no specific details will be described herein.

好ましくは、第1の第2導電型チャネル層280及び第2の第2導電型チャネル層2800の両方とも、イオン注入により形成された第2導電型注入層である。   Preferably, both the first second conductivity type channel layer 280 and the second second conductivity type channel layer 2800 are second conductivity type implantation layers formed by ion implantation.

好ましくは、フィールド電極プレート190は、多結晶層又は金属層とすることができる。本実施形態においては、多結晶層である。   Preferably, the field electrode plate 190 may be a polycrystalline layer or a metal layer. In the present embodiment, it is a polycrystalline layer.

好ましくは、高電圧電界効果トランジスタは、その両側の2つの第2導電型ウェル領域201と、これにより高電圧電界効果トランジスタを分離する、第1導電型エピタキシャル層200の下の第2導電型ディープウェル領域202とを備えることができる。   Preferably, the high voltage field effect transistor has a second conductivity type deep under the first conductivity type epitaxial layer 200 that separates the two second conductivity type well regions 201 on both sides thereof, thereby separating the high voltage field effect transistor. And a well region 202.

こうした構造体と実施形態1により与えられるJFETとの間の差は、ドレイン電極Dの両側に活性構造体(ソース電極及びゲート電極)が備わっており、こうした設計は、高電圧の印加時にJFETがもたらす周囲デバイスへの影響を回避でき、耐高電圧構造体を付加的に追加する必要もなく、チップ表面積を節約できることである。こうした二重ソース端子及びゲート端子の設計は、デバイスの性能も向上させる。   The difference between such a structure and the JFET provided by Embodiment 1 is that there are active structures (source electrode and gate electrode) on both sides of the drain electrode D, and such a design allows the JFET to be The effect on the surrounding devices can be avoided, chip surface area can be saved without the need to add additional high voltage structures. Such a dual source terminal and gate terminal design also improves device performance.

上記のJFETデバイスを製造するために、フォトエッチング工程を追加すること、及び第2導電型注入層を注入してチャネル領域を形成することに加えて、他の工程及びその製造条件も、従来のCMOS/LDMOS集積回路製造技術に適合する。   In order to manufacture the above-mentioned JFET device, in addition to adding a photo-etching process and injecting a second conductivity type injection layer to form a channel region, other processes and manufacturing conditions are also conventional. Compatible with CMOS / LDMOS integrated circuit manufacturing technology.

本ソリューションの実現可能性を検証するために、これにより製造されたデバイスの試験が行われた。   In order to verify the feasibility of the solution, the devices produced were tested.

図3及び図4を参照すると、図3は、Id−Vgsのドレイン電極電流−ゲートソース電圧の特性グラフであり、図4は、Id−Vdsのドレイン電極電流−ドレインソース電極電圧の特性グラフであり、そのピンチ・オフ電圧は、約−6ボルトであり、その降伏電圧は全て約50ボルトより上である。   Referring to FIGS. 3 and 4, FIG. 3 is a characteristic graph of drain electrode current-gate source voltage of Id-Vgs, and FIG. 4 is a characteristic graph of drain electrode current-drain source electrode voltage of Id-Vds. Yes, its pinch-off voltage is about -6 volts, and its breakdown voltage is all above about 50 volts.

本発明により与えられる高電圧JFETは、耐高電圧性という要件を満たすだけでなく、良好なJFET IV特性ももたらし、CMOS/LDMOS集積回路製造技術に適し、従って、統合が容易である。   The high voltage JFET provided by the present invention not only satisfies the requirement of high voltage resistance, but also provides good JFET IV characteristics, is suitable for CMOS / LDMOS integrated circuit manufacturing technology and is therefore easy to integrate.

上述の開示された実施形態は、当業者が本発明を実装又は使用するのを可能にすることができる。当業者であれば、他の実施形態の実施において、本発明の趣旨又は範囲の一般的な原理から逸脱することなく、本明細書に定められたような、これらの実施形態の種々の修正をなし得ることが、当業者には明らかであろう。従って、本発明は、本明細書で示される実施形態に限定されるものではなく、最も広い範囲の原理及び新規な特徴と一致するように開示した本明細書に従う。   The above disclosed embodiments can enable those skilled in the art to implement or use the invention. Those skilled in the art will appreciate that various modifications of these embodiments, as defined herein, may be made in implementing other embodiments without departing from the general principles of the spirit or scope of the present invention. It will be apparent to those skilled in the art that this can be done. Accordingly, the present invention is not intended to be limited to the embodiments shown herein, but to the specification disclosed to be consistent with the broadest range of principles and novel features.

100、200:第1導電型エピタキシャル層
101:第2導電型ウェル領域
102:第2導電型ディープウェル領域
110、210:第2導電型ドリフト領域
120、220:第2導電型ドレイン高ドープ領域
130、230、2300:ドレイン端子酸素領域
140、240、2400:第1導電型ウェル領域
150:第2導電型ソース高ドープ領域
160:第1導電型ゲート高ドープ領域
170:ゲートソース高ドープ領域
180、280、2800:第2導電型チャネル層
190、290、2900:フィールド電極プレート
191、291、2910:誘電体層
250、2500:第1導電型ゲート高ドープ領域
260、2600:第2導電型ソース高ドープ領域
270、2700:ゲートソース端子酸素領域
D:ドレイン電極
S:ソース電極
G:ゲート電極
100, 200: first conductivity type epitaxial layer 101: second conductivity type well region 102: second conductivity type deep well region 110, 210: second conductivity type drift region 120, 220: second conductivity type drain highly doped region 130 , 230, 2300: drain terminal oxygen regions 140, 240, 2400: first conductivity type well region 150: second conductivity type source highly doped region 160: first conductivity type gate highly doped region 170: gate source highly doped region 180, 280, 2800: second conductivity type channel layer 190, 290, 2900: field electrode plates 191, 291 and 2910: dielectric layer 250, 2500: first conductivity type gate heavily doped region 260, 2600: second conductivity type source height Doped region 270, 2700: gate source terminal oxygen region D: drain electrode S Source electrode G: gate electrode

Claims (13)

第1導電型エピタキシャル層を備えた半導体基板と、
前記第1導電型エピタキシャル層上に配置された第2導電型ドリフト領域と、
前記第2導電型ドリフト領域内に配置された第2導電型ドレイン高ドープ領域と、
前記第2導電型ドリフト領域上及び前記第2導電型ドレイン高ドープ領域の1つの側に配置されたドレイン端子酸素領域と、
前記第2導電型ドリフト領域の1つの側に配置され、前記第1導電型エピタキシャル層により前記第2導電型ドリフト領域から分離される、第1導電型ウェル領域と、
前記第1導電型ウェル領域上に配置された第2導電型ソース高ドープ領域及び第1導電型ゲート高ドープ領域、並びに前記第2導電型ソース高ドープ領域と前記第1導電型ゲート高ドープ領域との間に設けられ、前記第1導電型ゲート高ドープ領域から前記第2導電型ソース高ドープ領域を分離するゲートソース端子酸素領域と、
前記第2導電型ソース高ドープ領域と前記第2導電型ドリフト領域との間に配置された第2導電型チャネル層と、
前記第2導電型チャネル層上に配置され、前記ドレイン端子酸素領域の表面の一部分まで延びるフィールド電極プレート、並びに前記フィールド電極プレートと前記第2導電型チャネル層との間及び同じく前記フィールド電極プレートと前記第2導電型ドリフト領域との間に設けられた誘電体層と、
を含み、
ドレイン電極が、前記第2導電型ドレイン高ドープ領域から電気的に導出され、ソース電極が、前記フィールド電極プレートと前記第2導電型ソース高ドープ領域との接続から電気的に導出され、ゲート電極が、前記第1導電型ゲート高ドープ領域から電気的に導出されることを特徴とする、高電圧接合型電界効果トランジスタ。
A semiconductor substrate comprising a first conductivity type epitaxial layer;
A second conductivity type drift region disposed on the first conductivity type epitaxial layer;
A second conductivity type drain heavily doped region disposed in the second conductivity type drift region;
A drain terminal oxygen region disposed on the second conductivity type drift region and on one side of the second conductivity type drain heavily doped region;
A first conductivity type well region disposed on one side of the second conductivity type drift region and separated from the second conductivity type drift region by the first conductivity type epitaxial layer;
The second conductivity type source heavily doped region and the first conductivity type gate highly doped region, and the second conductivity type source highly doped region and the first conductivity type gate highly doped region disposed on the first conductivity type well region. A gate source terminal oxygen region separating the second conductivity type source highly doped region from the first conductivity type gate highly doped region,
A second conductivity type channel layer disposed between the second conductivity type source heavily doped region and the second conductivity type drift region;
A field electrode plate disposed on the second conductivity type channel layer and extending to a part of the surface of the drain terminal oxygen region; and between the field electrode plate and the second conductivity type channel layer and also the field electrode plate; A dielectric layer provided between the second conductivity type drift region;
Including
A drain electrode is electrically derived from the second conductivity type drain highly doped region, and a source electrode is electrically derived from a connection between the field electrode plate and the second conductivity type source highly doped region, and a gate electrode Is electrically derived from the first-conductivity-type gate heavily doped region.
前記第2導電型チャネル層は、イオン注入により形成された第2導電型注入層であることを特徴とする、請求項1に記載の高電圧接合型電界効果トランジスタ。   2. The high voltage junction field effect transistor according to claim 1, wherein the second conductivity type channel layer is a second conductivity type implantation layer formed by ion implantation. 前記フィールド電極プレートは多結晶層又は金属層であることを特徴とする、請求項1に記載の高電圧接合型電界効果トランジスタ。   2. The high voltage junction field effect transistor according to claim 1, wherein the field electrode plate is a polycrystalline layer or a metal layer. 前記高電圧接合型電界効果トランジスタは、その両側に第2導電型ウェル領域を備えており、第2導電型ディープウェル領域が、前記第1導電型エピタキシャル層の下に設けられて、前記高電圧電界効果トランジスタを分離することを特徴とする、請求項1に記載の高電圧接合型電界効果トランジスタ。   The high voltage junction field effect transistor includes a second conductivity type well region on both sides thereof, and a second conductivity type deep well region is provided under the first conductivity type epitaxial layer, and 2. The high voltage junction field effect transistor according to claim 1, wherein the field effect transistor is separated. 耐高電圧構造体が、前記第1導電型ウェル領域の反対側の前記第2導電型ドリフト領域の1つの側に設けられることを特徴とする、請求項1に記載の高電圧接合型電界効果トランジスタ。   2. The high voltage junction field effect according to claim 1, wherein a high voltage resistant structure is provided on one side of the second conductivity type drift region opposite to the first conductivity type well region. 3. Transistor. 前記第1導電型はP型であり、前記第2導電型はN型であることを特徴とする、請求項1に記載の高電圧接合型電界効果トランジスタ。   2. The high voltage junction field effect transistor according to claim 1, wherein the first conductivity type is P-type and the second conductivity type is N-type. 前記第1導電型はN型であり、前記第2導電型はP型であることを特徴とする、請求項1に記載の高電圧接合型電界効果トランジスタ。   The high voltage junction field effect transistor according to claim 1, wherein the first conductivity type is an N type, and the second conductivity type is a P type. 第1導電型エピタキシャル層を備えた半導体基板と、
前記第1導電型エピタキシャル層上に配置された第2導電型ドリフト領域と、
前記第2導電型ドリフト領域内に配置された第2導電型ドレイン高ドープ領域と、
前記第2導電型ドレイン高ドープ領域の両側に配置され、両方とも前記第2導電型ドリフト領域上に配置された、2つのドレイン端子酸素領域と、
前記第2導電型ドリフト領域の両側に配置され、各々が前記第1導電型エピタキシャル層により前記第2導電型ドリフト領域から分離される、2つの第1導電型ウェル領域と、
前記第1導電型ウェル領域の各々の中の第2導電型ソース高ドープ領域及び第1導電型ゲート高ドープ領域、並びに前記第2導電型ソース高ドープ領域と前記第1導電型ゲート高ドープ領域との間に設けられて、前記第1導電型ゲート高ドープ領域から前記第2導電型ソース高ドープ領域を分離するゲートソース端子酸素領域と、
各々が1つの第2導電型ソース高ドープ領域と前記第2導電型ドリフト領域との間に配置された、2つの第2導電型チャネル層と、
それぞれ前記2つの第2導電型チャネル層上に配置され、各々が対応するドレイン端子酸素領域の表面の一部分まで延びる2つのフィールド電極プレート、並びに前記フィールド電極プレートと前記第2導電型チャネル層との間及び同じく前記フィールド電極プレートと前記第2導電型ドリフト領域との間に設けられた誘電体層と、
を含み、
ドレイン電極が、前記2つの第2導電型ドレイン高ドープ領域から電気的に導出され、ソース電極が、前記ドレイン電極の両側の前記2つのフィールド電極プレートと前記2つの第2導電型ソース高ドープ領域との接続から電気的に導出され、ゲート電極が、前記ドレイン電極の両側の、前記2つの第1導電型ゲート高ドープ領域の接続から電気的に導出されることを特徴とする、高電圧接合型電界効果トランジスタ。
A semiconductor substrate comprising a first conductivity type epitaxial layer;
A second conductivity type drift region disposed on the first conductivity type epitaxial layer;
A second conductivity type drain heavily doped region disposed in the second conductivity type drift region;
Two drain terminal oxygen regions disposed on both sides of the second conductivity type drain heavily doped region, both disposed on the second conductivity type drift region;
Two first conductivity type well regions disposed on both sides of the second conductivity type drift region, each separated from the second conductivity type drift region by the first conductivity type epitaxial layer;
A second conductivity type source heavily doped region and a first conductivity type gate highly doped region in each of the first conductivity type well regions, and the second conductivity type source highly doped region and the first conductivity type gate highly doped region. A gate source terminal oxygen region separating the second conductivity type source highly doped region from the first conductivity type gate highly doped region,
Two second conductivity type channel layers, each disposed between one second conductivity type source heavily doped region and the second conductivity type drift region;
Two field electrode plates each disposed on the two second conductivity type channel layers, each extending to a portion of the surface of the corresponding drain terminal oxygen region, and the field electrode plate and the second conductivity type channel layer And a dielectric layer provided between the field electrode plate and the second conductivity type drift region,
Including
A drain electrode is electrically derived from the two second conductivity type drain heavily doped regions, and a source electrode is the two field electrode plates on both sides of the drain electrode and the two second conductivity type source highly doped regions. A high voltage junction, wherein the gate electrode is electrically derived from the connection of the two first-conductivity-type gate highly doped regions on both sides of the drain electrode. Type field effect transistor.
前記第2導電型チャネル層は、イオン注入により形成された第2導電型注入層であることを特徴とする、請求項8に記載の高電圧接合型電界効果トランジスタ。   9. The high voltage junction field effect transistor according to claim 8, wherein the second conductivity type channel layer is a second conductivity type implantation layer formed by ion implantation. 前記フィールド電極プレートは多結晶層又は金属層であることを特徴とする、請求項8に記載の高電圧接合型電界効果トランジスタ。   9. The high voltage junction field effect transistor according to claim 8, wherein the field electrode plate is a polycrystalline layer or a metal layer. 前記高電圧接合型電界効果トランジスタは、その両側に第2導電型ウェル領域を備えており、第2導電型ディープウェル領域が、前記第1導電型エピタキシャル層の下に設けられて、前記高電圧電界効果トランジスタを分離することを特徴とする、請求項8に記載の高電圧接合型電界効果トランジスタ。   The high voltage junction field effect transistor includes a second conductivity type well region on both sides thereof, and a second conductivity type deep well region is provided under the first conductivity type epitaxial layer, and 9. The high voltage junction field effect transistor according to claim 8, wherein the field effect transistor is separated. 前記第1導電型はP型であり、前記第2導電型はN型であることを特徴とする、請求項8に記載の高電圧接合型電界効果トランジスタ。   9. The high voltage junction field effect transistor according to claim 8, wherein the first conductivity type is P-type and the second conductivity type is N-type. 前記第1導電型はN型であり、前記第2導電型はP型であることを特徴とする、請求項8に記載の高電圧接合型電界効果トランジスタ。   9. The high voltage junction field effect transistor according to claim 8, wherein the first conductivity type is an N type, and the second conductivity type is a P type.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113066854A (en) * 2021-03-18 2021-07-02 电子科技大学 High-voltage Junction Field Effect Transistor (JFET) device and manufacturing method thereof

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9111992B2 (en) * 2011-09-13 2015-08-18 Globalfoundries Singapore Pte. Ltd. Semiconductor device including an n-well structure
US9299857B2 (en) * 2014-06-19 2016-03-29 Macronix International Co., Ltd. Semiconductor device
US10784372B2 (en) * 2015-04-03 2020-09-22 Magnachip Semiconductor, Ltd. Semiconductor device with high voltage field effect transistor and junction field effect transistor
KR101975630B1 (en) * 2015-04-03 2019-08-29 매그나칩 반도체 유한회사 Semiconductor Structure having a Junction Field Effect Transistor and a High Voltage Transistor and Method for Manufacturing the same
US9543452B1 (en) * 2015-07-01 2017-01-10 Macronix International Co., Ltd. High voltage junction field effect transistor
US9583612B1 (en) 2016-01-21 2017-02-28 Texas Instruments Incorporated Drift region implant self-aligned to field relief oxide with sidewall dielectric
CN108807379B (en) * 2017-05-05 2021-08-27 立锜科技股份有限公司 High-voltage depletion type MOS (Metal oxide semiconductor) element with adjustable threshold voltage and manufacturing method thereof
US10361296B2 (en) 2017-06-29 2019-07-23 Monolith Semiconductor Inc. Metal oxide semiconductor (MOS) controlled devices and methods of making the same
TWI650866B (en) * 2017-08-30 2019-02-11 立錡科技股份有限公司 High voltage component and method of manufacturing same
CN109473427B (en) * 2017-09-08 2020-06-30 立锜科技股份有限公司 High voltage device and method for manufacturing the same
CN110350018B (en) * 2018-04-02 2023-05-26 世界先进积体电路股份有限公司 Semiconductor structure and manufacturing method thereof
US11289613B2 (en) 2019-10-16 2022-03-29 Semiconductor Components Industries, Llc Electronic device including a junction field-effect transistor
CN111180509B (en) * 2019-12-31 2022-08-23 杰华特微电子股份有限公司 Junction field effect transistor and electrostatic discharge structure thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5889872A (en) * 1981-11-24 1983-05-28 Hitachi Ltd Junction type field effect semiconductor device
JPH10209175A (en) * 1997-01-22 1998-08-07 Nikon Corp Junction field-effect transistor and its manufacture
CN101969072A (en) * 2010-08-27 2011-02-09 东南大学 Consumption type N-type lateral double-diffusion metal-oxide semiconductor for reducing voltage

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4314267A (en) * 1978-06-13 1982-02-02 Ibm Corporation Dense high performance JFET compatible with NPN transistor formation and merged BIFET
US4407005A (en) * 1980-01-21 1983-09-27 Texas Instruments Incorporated N-Channel JFET device having a buried channel region, and method for making same
US5910664A (en) * 1996-11-05 1999-06-08 International Rectifier Corporation Emitter-switched transistor structures
US6037238A (en) 1999-01-04 2000-03-14 Vanguard International Semiconductor Corporation Process to reduce defect formation occurring during shallow trench isolation formation
US20050104132A1 (en) * 2001-01-23 2005-05-19 Tsutomu Imoto Semiconductor device and manufacturing method thereof
JP2004200391A (en) * 2002-12-18 2004-07-15 Hitachi Ltd Semiconductor device
US8207580B2 (en) * 2009-05-29 2012-06-26 Power Integrations, Inc. Power integrated circuit device with incorporated sense FET
US8344472B2 (en) * 2010-03-30 2013-01-01 Freescale Semiconductor, Inc. Semiconductor device and method
US8541862B2 (en) * 2011-11-30 2013-09-24 Freescale Semiconductor, Inc. Semiconductor device with self-biased isolation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5889872A (en) * 1981-11-24 1983-05-28 Hitachi Ltd Junction type field effect semiconductor device
JPH10209175A (en) * 1997-01-22 1998-08-07 Nikon Corp Junction field-effect transistor and its manufacture
CN101969072A (en) * 2010-08-27 2011-02-09 东南大学 Consumption type N-type lateral double-diffusion metal-oxide semiconductor for reducing voltage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113066854A (en) * 2021-03-18 2021-07-02 电子科技大学 High-voltage Junction Field Effect Transistor (JFET) device and manufacturing method thereof

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